Structural Complexity in Living Things

From Atoms to Organisms

Draw a picture of an atom and a cell on your paper. Label as many parts as

possible.

Atom

Cell

Cell

Figure 1.1

Organismal levelHuman organisms are made up of many organ systems.

Organ system levelOrgan systems consist of different organs that work together closely.

Organ levelOrgans are made up of different types of tissues.

Chemical levelAtoms combine toform molecules.

Smooth muscle cell

Cellular levelCells are made up of molecules.

Molecules

2Atoms

1

Tissue levelTissues consist of similar types of cells.

3

Smoothmuscletissue

Epithelialtissue

Smoothmuscletissue

Connectivetissue

Bloodvessel(organ)

4

5

Cardio–vascularsystem

6

Bloodvessels

Heart

Figure 1.1, step 1

Figure 1.1, step 2

Figure 1.1, step 3

Figure 1.1, step 4

Figure 1.1, step 5

Figure 1.1, step 6